The New York City-based organization Freedom to Marry is working to obtain same-sex marriage rights nationwide and to overturn the federal Defense of Marriage Act. Evan Wolfson is president.

Rabbi Eric Yoffie is the president emeritus of the Union for Reform Judaism.

David Klinghoffer is a senior fellow at the Discovery Institute and the editor of Evolution News & Views.

Rabbi Yechiel Z. Eckstein is founder and president of the International Fellowship of Christians and Jews. In 2005, Eckstein was appointed Goodwill Ambassador to the State of Israel. Contact through Tönya Derrickson.

StandWithUs is a pro-Israel advocacy group founded by Roz Rothstein, named one of the 50 most influential Jews by Forward in 2008. The organization maintains chapters by region as well as a youth branch, StandWithUs Campus, with several regional offices.

Neturei Karta is an anti-Zionist organization that opposes the existence of the state of Israel because its members believe that a sovereign Israel is contrary to Jewish law. Rabbi Dovid Weiss is associate director and is based in Monsey, N.Y. Contact via the form on its website.

Mercaz USA is the Zionist arm of the Conservative movement. It advocates for Israel and works to build ties between the Jewish diaspora and Israel. Janet Tobin is president. It is based in New York City.

The Israel on Campus Coalition advocates for Israel on college campuses, monitoring for anti-Israel bias in media and in classes. Marjan Keypour Greenblatt is acting director.

Encounter introduces emerging Jewish leaders to the issues of Palestine and its people. Yona Shem-Tov is its North American co-director.